Now that Windows 8 has gone gold, Microsoft can move on to other things. With Windows 8, the most important of these is probably to make sure people know how to actually use it. Metro is filled to the brim with hard-to-discover features, but Microsoft has a plan. Will it be enough?

or they looked up "Metro" in the urban dictionary. Before Microsoft started using the term, that is the definition I was aware of

Seriously? More than, you know, metropolitan rapid transit networks, or many public transport networks in general? (quite a few with the word in their proper name; in many languages, the word being a general term to describe them) Or "metro" overall as a shortened "metropolitan area"?
(also, there's the Metro newspaper - with its many worldwide edition, possibly the one with largest circulation)